Fitted the Raceland Wind Deflector that I got from eBay. Quite a straight forward fit – just a matter of slacking off the 3 hood support screws on each side removing two of the screws one at a time to slide in the deflector brackets and then ‘re tightening the screws.
The deflector is attached to the brackets by a couple of screwed knobs.
It does not stop the wind buffeting completely but it greatly reduces it to such a point that I don’t think I’m going to lose my cap.
I might modify it over winter to raise it’s height by about an inch which I think will improve its effectiveness.
This is a link to the Raceland website at https://racelandeurope.com/mg/mgb/mg-mgb-windscreen.html